Speaker for an electronic instrument

Abstract

A speaker has a frame provided with a yoke, a magnet, a vibrating plate and a voice coil, and a pair of leads. An end of each of the leads is connected to an end of the coil and the other end portion of the lead is exposed in a hole formed in the frame and secured to the frame so as to be connected to an outside terminal. A terminal connecting device is provided for connecting the other end of the lead to the outside terminal. The terminal connecting device comprises a cylindrical case secured in the hole of the frame, a connecting rod slidably mounted in the cylindrical case, and a coil spring provided in the cylindrical case to outwardly urge the connecting rod so as to be contacted with the outside terminal at an end of the rod. A top end of the cylindrical case is contacted with the end portion of the lead.

What is claimed is:  
     
       1. A speaker comprising: 
       a cylindrical frame ( 2 ) provided with a yoke, a permanent magnet, a vibrating plate and a voice coil secured to the vibrating plate,  
       the cylindrical frame having a pair of holes ( 2   d ) each of which is formed in an axial direction of the frame and opened to an underside of the frame,  
       a pair of lead plates ( 9 ) embedded in the frame,  
       an end of each of the lead plates being connected to an end of the voice coil, and the other end ( 9   a ) of the lead plate being exposed in the hole,  
       a terminal connecting device ( 10 ) provided in each of the holes, wherein the terminal connecting device comprises a cylindrical case ( 11 ) made of metal and secured to an inside wall of the hole by a securing means,  
       the cylindrical case has an upper closed end portion and a lower end opening, and a flange ( 11   a ) formed at a lower portion thereof,  
       a connecting rod ( 12 ) made of metal and having a head ( 12   a ) slidably engaged with an inside wall of the cylindrical case,  
       a coil spring ( 13 ) provided between the upper closed end and the head ( 12   a ) so that the connecting rod is projected from the lower end opening and stopped by engagement of head with a stopper edge ( 11   c ),  
       the flange is pressed against an underside of the frame, thereby pressing the upper closed end portion of the cylindrical case against the underside of the other end ( 9   a ) of the lead plate.  
     
     
       2. The speaker according to  claim 1 , wherein the upper end portion is an upper end surface. 
     
     
       3. The speaker according to  claim 1 , wherein the upper end portion is a ball provided in an opening formed in an upper end wall. 
     
     
       4. The speaker according to  claim 1 , wherein the securing means is force fit engagement.